Rigid Body Mesh
Hi everybody
I would like to create a rigid mesh on the surface of a body, because i need a rigid
body, for which are not calculated stresses neither strains.
Could i mesh this surface using 'rigid body mesh' panel in automesh panel?
if it is the way, the mesh created will be used just to compute other things like interfaces
reactions or others, and the mesh created will be completely rigid ... i'm i wrong?
thanks
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Thanks NSKRTLUS and Prakash
I have a body that i mesh 2D with shell elements; for that body i define i rigid with a master
node in the centre and the mesh nodes as slave nodes. In the master i apply a initial velocity.
But if i mesh it with 'rigid body mesh' in Automesh panel, the software will not calculate straind and stresses?
Why should not behave like rigid mesh if i define i propery and material?
Foe example in any ditching problems i wolud like to treat the ditching object like rigid, but i need a mesh
to define interfaces between the object and the fluid.
Supposing that the body will float, if i do not define a thikness and density for that rigid ditching body, how can
software compute the Arichimedes Principle?
Hi Prakash
no, i do not see any stress strain data...
to be explicit i'm on the sphere ditching in SPH (water);
but my doubt is this: if rigid mesh defines elements just for a topological reppresentation,
how can i use these elements as master surfaces in type 7 interface, if don't define a young modulus for sphere material
(supposing type7 interface vith ISTF=0 and STFAC= %of young modulus if the material of master surface)
ok...and this is an idea...
what if i use rigid mesh in automesh panel and instead of ISTF=0 i use ISTF=1 so defining a precise STFAC in Pascal?
in conclusion i need a sphere (shell elemnts) that behaves as rigid body, so no stresses and strains calculated and output, but
with the need to define a type7 contact with a interface stifness...
whitch could be the easiest way to do this?
thanks
Damir,
Penalty values will have its effect on time step in explicit analysis.
In your case, yes and no. I ran a simple plate with different STFACs and literally there is no change in time step or vey very minimal.
But my problem here is simple. When you have more a complicate models and non-linearity this may not be true.
Hi Damir,
As far as i know,it is only an option for meshing.It is useful for meshing parts which will be used as rigid mesh,but if you define any different kind of property and material it won't behave like rigid.